src/audio/bsd/SDL_bsdaudio.c
author Ryan C. Gordon <icculus@icculus.org>
Sun, 24 Jul 2011 03:37:13 -0700
changeset 5586 7fe92c1dc1d9
parent 5535 96594ac5fd1a
child 5593 ab22ca13c47f
permissions -rw-r--r--
Removed /dev/dsp DMA audio target.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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/*
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 * Driver for native OpenBSD/NetBSD audio(4).
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 * vedge@vedge.com.ar.
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 */
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/audioio.h>
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "../SDL_audiomem.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_audiodev_c.h"
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#include "SDL_bsdaudio.h"
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/* The tag name used by NetBSD/OpenBSD audio */
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#ifdef __NetBSD__
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#define BSD_AUDIO_DRIVER_NAME         "netbsd"
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#define BSD_AUDIO_DRIVER_DESC         "Native NetBSD audio"
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#else
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#define BSD_AUDIO_DRIVER_NAME         "openbsd"
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#define BSD_AUDIO_DRIVER_DESC         "Native OpenBSD audio"
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#endif
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/* Open the audio device for playback, and don't block if busy */
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/* #define USE_BLOCKING_WRITES */
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/* Use timer for synchronization */
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/* #define USE_TIMER_SYNC */
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/* #define DEBUG_AUDIO */
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/* #define DEBUG_AUDIO_STREAM */
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#ifdef USE_BLOCKING_WRITES
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#define OPEN_FLAGS_OUTPUT O_WRONLY
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#define OPEN_FLAGS_INPUT O_RDONLY
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#else
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#define OPEN_FLAGS_OUTPUT (O_WRONLY|O_NONBLOCK)
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#define OPEN_FLAGS_INPUT (O_RDONLY|O_NONBLOCK)
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#endif
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/* !!! FIXME: so much cut and paste with dsp target... */
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static char **outputDevices = NULL;
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static int outputDeviceCount = 0;
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static char **inputDevices = NULL;
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static int inputDeviceCount = 0;
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static inline void
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free_device_list(char ***devs, int *count)
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{
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    SDL_FreeUnixAudioDevices(devs, count);
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}
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static inline void
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build_device_list(int iscapture, char ***devs, int *count)
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{
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    const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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    free_device_list(devs, count);
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    SDL_EnumUnixAudioDevices(flags, 0, NULL, devs, count);
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}
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static inline void
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build_device_lists(void)
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{
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    build_device_list(0, &outputDevices, &outputDeviceCount);
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    build_device_list(1, &inputDevices, &inputDeviceCount);
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}
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static inline void
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free_device_lists(void)
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{
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    free_device_list(&outputDevices, &outputDeviceCount);
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    free_device_list(&inputDevices, &inputDeviceCount);
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}
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static void
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BSDAUDIO_Deinitialize(void)
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{
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    free_device_lists();
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}
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static int
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BSDAUDIO_DetectDevices(int iscapture)
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{
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    if (iscapture) {
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        build_device_list(1, &inputDevices, &inputDeviceCount);
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        return inputDeviceCount;
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    } else {
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        build_device_list(0, &outputDevices, &outputDeviceCount);
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        return outputDeviceCount;
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    }
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    return 0;                   /* shouldn't ever hit this. */
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}
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   126
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static const char *
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BSDAUDIO_GetDeviceName(int index, int iscapture)
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{
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    if ((iscapture) && (index < inputDeviceCount)) {
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        return inputDevices[index];
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    } else if ((!iscapture) && (index < outputDeviceCount)) {
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        return outputDevices[index];
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    }
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    SDL_SetError("No such device");
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    return NULL;
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}
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static void
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BSDAUDIO_Status(_THIS)
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{
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#ifdef DEBUG_AUDIO
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    /* *INDENT-OFF* */
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    audio_info_t info;
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    if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
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        fprintf(stderr, "AUDIO_GETINFO failed.\n");
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        return;
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    }
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    fprintf(stderr, "\n"
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            "[play/record info]\n"
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            "buffer size	:   %d bytes\n"
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            "sample rate	:   %i Hz\n"
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            "channels	:   %i\n"
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            "precision	:   %i-bit\n"
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            "encoding	:   0x%x\n"
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            "seek		:   %i\n"
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            "sample count	:   %i\n"
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            "EOF count	:   %i\n"
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            "paused		:   %s\n"
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            "error occured	:   %s\n"
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            "waiting		:   %s\n"
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            "active		:   %s\n"
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            "",
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            info.play.buffer_size,
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            info.play.sample_rate,
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            info.play.channels,
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            info.play.precision,
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            info.play.encoding,
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            info.play.seek,
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            info.play.samples,
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            info.play.eof,
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            info.play.pause ? "yes" : "no",
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            info.play.error ? "yes" : "no",
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            info.play.waiting ? "yes" : "no",
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            info.play.active ? "yes" : "no");
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    fprintf(stderr, "\n"
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            "[audio info]\n"
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            "monitor_gain	:   %i\n"
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            "hw block size	:   %d bytes\n"
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            "hi watermark	:   %i\n"
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            "lo watermark	:   %i\n"
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            "audio mode	:   %s\n"
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            "",
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            info.monitor_gain,
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            info.blocksize,
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            info.hiwat, info.lowat,
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            (info.mode == AUMODE_PLAY) ? "PLAY"
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            : (info.mode = AUMODE_RECORD) ? "RECORD"
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   193
            : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
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    /* *INDENT-ON* */
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#endif /* DEBUG_AUDIO */
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}
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/* This function waits until it is possible to write a full sound buffer */
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static void
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   201
BSDAUDIO_WaitDevice(_THIS)
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{
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   203
#ifndef USE_BLOCKING_WRITES     /* Not necessary when using blocking writes */
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   204
    /* See if we need to use timed audio synchronization */
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   205
    if (this->hidden->frame_ticks) {
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   206
        /* Use timer for general audio synchronization */
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        Sint32 ticks;
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        ticks =
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            ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) -
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            FUDGE_TICKS;
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        if (ticks > 0) {
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            SDL_Delay(ticks);
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        }
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   215
    } else {
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   216
        /* Use select() for audio synchronization */
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   217
        fd_set fdset;
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   218
        struct timeval timeout;
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   219
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        FD_ZERO(&fdset);
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   221
        FD_SET(this->hidden->audio_fd, &fdset);
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   222
        timeout.tv_sec = 10;
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   223
        timeout.tv_usec = 0;
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   224
#ifdef DEBUG_AUDIO
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   225
        fprintf(stderr, "Waiting for audio to get ready\n");
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#endif
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        if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
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            <= 0) {
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   229
            const char *message =
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   230
                "Audio timeout - buggy audio driver? (disabled)";
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   231
            /* In general we should never print to the screen,
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   232
               but in this case we have no other way of letting
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   233
               the user know what happened.
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   234
             */
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   235
            fprintf(stderr, "SDL: %s\n", message);
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   236
            this->enabled = 0;
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   237
            /* Don't try to close - may hang */
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   238
            this->hidden->audio_fd = -1;
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   239
#ifdef DEBUG_AUDIO
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   240
            fprintf(stderr, "Done disabling audio\n");
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   241
#endif
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   242
        }
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   243
#ifdef DEBUG_AUDIO
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   244
        fprintf(stderr, "Ready!\n");
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   245
#endif
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   246
    }
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   247
#endif /* !USE_BLOCKING_WRITES */
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   248
}
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   249
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   250
static void
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   251
BSDAUDIO_PlayDevice(_THIS)
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   252
{
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   253
    int written, p = 0;
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   254
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   255
    /* Write the audio data, checking for EAGAIN on broken audio drivers */
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   256
    do {
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   257
        written = write(this->hidden->audio_fd,
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   258
                        &this->hidden->mixbuf[p], this->hidden->mixlen - p);
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   259
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   260
        if (written > 0)
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   261
            p += written;
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   262
        if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) {
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   263
            /* Non recoverable error has occurred. It should be reported!!! */
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   264
            perror("audio");
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   265
            break;
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   266
        }
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   267
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   268
        if (p < written
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   269
            || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) {
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   270
            SDL_Delay(1);       /* Let a little CPU time go by */
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   271
        }
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    } while (p < written);
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   273
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   274
    /* If timer synchronization is enabled, set the next write frame */
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   275
    if (this->hidden->frame_ticks) {
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   276
        this->hidden->next_frame += this->hidden->frame_ticks;
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   277
    }
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   278
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   279
    /* If we couldn't write, assume fatal error for now */
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   280
    if (written < 0) {
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   281
        this->enabled = 0;
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   282
    }
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   283
#ifdef DEBUG_AUDIO
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   284
    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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   285
#endif
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   286
}
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   287
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   288
static Uint8 *
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   289
BSDAUDIO_GetDeviceBuf(_THIS)
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   290
{
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   291
    return (this->hidden->mixbuf);
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   292
}
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   293
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   294
static void
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   295
BSDAUDIO_CloseDevice(_THIS)
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   296
{
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   297
    if (this->hidden != NULL) {
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   298
        if (this->hidden->mixbuf != NULL) {
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   299
            SDL_FreeAudioMem(this->hidden->mixbuf);
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   300
            this->hidden->mixbuf = NULL;
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   301
        }
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   302
        if (this->hidden->audio_fd >= 0) {
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   303
            close(this->hidden->audio_fd);
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   304
            this->hidden->audio_fd = -1;
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diff changeset
   305
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   306
        SDL_free(this->hidden);
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diff changeset
   307
        this->hidden = NULL;
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diff changeset
   308
    }
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diff changeset
   309
}
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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   310
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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   311
static int
2049
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   312
BSDAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
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   313
{
2049
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   314
    const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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   315
    SDL_AudioFormat format = 0;
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parents:
diff changeset
   316
    audio_info_t info;
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diff changeset
   317
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   318
    /* We don't care what the devname is...we'll try to open anything. */
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diff changeset
   319
    /*  ...but default to first name in the list... */
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diff changeset
   320
    if (devname == NULL) {
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diff changeset
   321
        if (((iscapture) && (inputDeviceCount == 0)) ||
866052b01ee5 indent is evil
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diff changeset
   322
            ((!iscapture) && (outputDeviceCount == 0))) {
2049
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diff changeset
   323
            SDL_SetError("No such audio device");
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diff changeset
   324
            return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   325
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   326
        devname = ((iscapture) ? inputDevices[0] : outputDevices[0]);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   327
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   328
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   329
    /* Initialize all variables that we clean on shutdown */
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diff changeset
   330
    this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
   331
        SDL_malloc((sizeof *this->hidden));
2049
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diff changeset
   332
    if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   333
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   334
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   335
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   336
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   337
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   338
    /* Open the audio device */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   339
    this->hidden->audio_fd = open(devname, flags, 0);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   340
    if (this->hidden->audio_fd < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   341
        SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   342
        return 0;
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parents: 1982
diff changeset
   343
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   344
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   345
    AUDIO_INITINFO(&info);
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1583
diff changeset
   346
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parents:
diff changeset
   347
    /* Calculate the final parameters for this audio specification */
2049
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diff changeset
   348
    SDL_CalculateAudioSpec(&this->spec);
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   349
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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diff changeset
   350
    /* Set to play mode */
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   351
    info.mode = AUMODE_PLAY;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   352
    if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   353
        BSDAUDIO_CloseDevice(this);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1583
diff changeset
   354
        SDL_SetError("Couldn't put device into play mode");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   355
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   356
    }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   357
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   358
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   359
    for (format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   360
         format; format = SDL_NextAudioFormat()) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   361
        switch (format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   362
        case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   363
            info.play.encoding = AUDIO_ENCODING_ULINEAR;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   364
            info.play.precision = 8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   365
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   366
        case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   367
            info.play.encoding = AUDIO_ENCODING_SLINEAR;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   368
            info.play.precision = 8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   369
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   370
        case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   371
            info.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   372
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   373
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   374
        case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   375
            info.play.encoding = AUDIO_ENCODING_SLINEAR_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   376
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   377
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   378
        case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   379
            info.play.encoding = AUDIO_ENCODING_ULINEAR_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   380
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   381
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   382
        case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   383
            info.play.encoding = AUDIO_ENCODING_ULINEAR_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   384
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   385
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   386
        default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   387
            continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   388
        }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   389
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   390
        if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   391
            break;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   392
        }
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   393
    }
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   394
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   395
    if (!format) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   396
        BSDAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   397
        SDL_SetError("No supported encoding for 0x%x", this->spec.format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   398
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   399
    }
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   400
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   401
    this->spec.format = format;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   402
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   403
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   404
    info.play.channels = this->spec.channels;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   405
    if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == -1) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   406
        this->spec.channels = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   407
    }
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   408
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   409
    info.play.sample_rate = this->spec.freq;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   410
    info.blocksize = this->spec.size;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   411
    info.hiwat = 5;
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   412
    info.lowat = 3;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   413
    (void) ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   414
    (void) ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   415
    this->spec.freq = info.play.sample_rate;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   416
    /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   417
    this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   418
    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   419
    if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   420
        BSDAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   421
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   422
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   423
    }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   424
    SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   425
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   426
    BSDAUDIO_Status(this);
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   427
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   428
    /* We're ready to rock and roll. :-) */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   429
    return (0);
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   430
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   431
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   432
static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   433
BSDAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   434
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   435
    /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   436
    impl->DetectDevices = BSDAUDIO_DetectDevices;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   437
    impl->GetDeviceName = BSDAUDIO_GetDeviceName;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   438
    impl->OpenDevice = BSDAUDIO_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   439
    impl->PlayDevice = BSDAUDIO_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   440
    impl->WaitDevice = BSDAUDIO_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   441
    impl->GetDeviceBuf = BSDAUDIO_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   442
    impl->CloseDevice = BSDAUDIO_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   443
    impl->Deinitialize = BSDAUDIO_Deinitialize;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   444
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   445
    build_device_lists();
3699
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
Ryan C. Gordon <icculus@icculus.org>
parents: 3697
diff changeset
   446
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
Ryan C. Gordon <icculus@icculus.org>
parents: 3697
diff changeset
   447
    return 1;   /* this audio target is available. */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   448
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   449
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   450
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   451
AudioBootStrap BSD_AUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   452
    BSD_AUDIO_DRIVER_NAME, BSD_AUDIO_DRIVER_DESC, BSDAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   453
};
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   454
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   455
/* vi: set ts=4 sw=4 expandtab: */